People march through the streets of Los Angeles as part of a 300-mile trek from Merced County to the U.S.-Mexico border, in an awareness campaign for the plight of undocumented immigrant mothers and their children. | (REUTERS/Lucy Nicholson)

A protester throws a smoke bomb back at police in Ferguson, Missouri. | (REUTERS/Mario Anzuoni)

A sales assistant sits next to TV sets broadcasting a report on Pope Francis' arrival in Seoul, South Korea. | (REUTERS/Kim Hong-Ji)

Refugees from the minority Yazidi sect walk toward the Syrian border. The rise of the Islamic State in Iraq and Syria, which has declared a caliphate in parts of Iraq and Syria, has prompted tens of thousands of Yazidis and Christians to flee for their lives. | (REUTERS/Rodi Said)

A woman basks in the sun on the Promenade Des Anglais, in Nice. | (REUTERS/Eric Gaillard)

A giant panda eats in its enclosure at the Chimelong Safari Park, in Guangzhou, China. | (REUTERS/Alex Lee)